Insulating-support for electric third rails.



No; 763,434. PATBNTBD JUNE 28, 1904.

F. R. SLATER.

I INSULATING SUPPORT FOR ELECTRIC THIRD RAILS.

APPLICATION FILED MAY 28, 1903.

N0 MODEL.

AK x I uml A 4 q vwmeooeo I QM UNITED STATES Patented June 28, 1904.

PATENT EErcE.

FREDERICK R. SLATER, OF NEW YORK, N. Y., ASSIGNOR TO ROBERT W.- LYLE, OF NEW YORK, N. Y.

INSULATING-SUPPORT FOR ELECTRIC THIRD RAILS.

SPECIFICATION forming part of Letters Patent No. 763,434, dated June 28, 1904:.

Application file. May 28, 1903. Serial No. 159,061. (No model.)

citizen of the United States, and a resident of.

New York, in the county and State of New 5 York,l1ave invented certain new and useful Improvements in Insulating-Supports for Electric Third Rails, of which the following is a specification.

This invention'relates to insulating-supports 10 for electric third rails of that class which are employed as an electric conductor in the operation of electric railways.

he object of my invention is to provide a simple and improved support of the character 1 5 above stated which will not only effectively support the rail, but which will provide effective insulation and which will, furthermore, possess advantages in point of strength, convenience and inexpensiveness in manufac- 2o tu re, simplicity, effectiveness, and general efficiency.

My present improvements have particular relation to the mounting and support of T- rails of the electriekconductor class above 25 noted, which rails are without a base or bot:

tom flange. i

In the drawings, Figure 1 is a vertical transverse sectional view taken through the third rail and showing the supporting means and 3 base inside elevation. Fig. 2 is a side elevation of the structure illustrated in Fig. 1. Fig. 3 is a detail cross-section taken on the line :0 m, Fig. 1. v

, Corresponding parts in all the figures are 3 5 denoted by the same reference characters.

Referring to the drawings, 1 designates a support or base, which may be in the main of any suitable or adapted construction and is formed of 'a suitable strong insulating mate- 4 rial, such as vitrified clay. 'This base may be mounted in any suitable or adapted manner upon the bed or structure of the railway.

2 2 designate chairs for carrying the rail proper, which chairs also embody clamps for 4 5 retaining the rail and are carried by the base or support 1. The chairs and clamps 2 are respectively constructed and arranged as detachable half-sections for purposes of convenience in construction and arrangement. Each part 5.

of said sections 2 comprises a body portion 3, arranged to extend in a transverse plane over the top surface 4 of the block 1 and rest upon the same, and these body portions constitute the support for the rail. The body portion 3 is bifurcated or recessed longitudinally, as

' indicated at 5, preferably in its under portion, for purposes of lightness and saving of material and also to provide for the securingbolt hereinafter described.

It will be understood that the chairs and clamps 2 are formed of metal or other strong material, and it will be noted that the longitudinal extent of the body portions 3 is preferably such that at their inner opposite ends a space, as at 8, will exist when the parts are assembled together to provide for contraction and expansion.

At the outer ends, of the body portions 3 are provided downward ly-projecting mem bers 11, which provide a plate which extends at the side of the insulating block or support 1, and said members 11 carry inwardly-project ing lugs or nibs 12, which are received by corresponding recesses 13 in the sides of the block 1, whereby the body portions 3 will be engaged in connection withthe block 1. I

preferably provide a pair or plurality of such lugs and recesses at. each side of theclamp :and block structure, as shown in the drawings, whereby wabbling or movement of 1 the members 3 is more effectually obviated.

intersecting the recessed or bifurcated portion 5, for the passage of a securing or clamping bolt 16, which passes transversely through the rail-seat and clamp structure and is accommodated in the bifurcated or recessed This securing-bolt 16 thus passes across and above the block or support 1. preferably on a plane above the top surface of 

